fix api arg0

test=release/1.3

paddle/fluid/API.spec

@@ -473,11 +473,11 @@ paddle.fluid.LoDTensor.has_valid_recursive_sequence_lengths has_valid_recursive_
 paddle.fluid.LoDTensor.lod lod(self: paddle.fluid.core.LoDTensor) -> List[List[int]]
 paddle.fluid.LoDTensor.recursive_sequence_lengths recursive_sequence_lengths(self: paddle.fluid.core.LoDTensor) -> List[List[int]]
 paddle.fluid.LoDTensor.set 1. set(self: paddle.fluid.core.Tensor, arg0: numpy.ndarray[float32], arg1: paddle::platform::CPUPlace) -> None  2. set(self: paddle.fluid.core.Tensor, arg0: numpy.ndarray[int32], arg1: paddle::platform::CPUPlace) -> None  3. set(self: paddle.fluid.core.Tensor, arg0: numpy.ndarray[float64], arg1: paddle::platform::CPUPlace) -> None  4. set(self: paddle.fluid.core.Tensor, arg0: numpy.ndarray[int64], arg1: paddle::platform::CPUPlace) -> None  5. set(self: paddle.fluid.core.Tensor, arg0: numpy.ndarray[bool], arg1: paddle::platform::CPUPlace) -> None  6. set(self: paddle.fluid.core.Tensor, arg0: numpy.ndarray[uint16], arg1: paddle::platform::CPUPlace) -> None  7. set(self: paddle.fluid.core.Tensor, arg0: numpy.ndarray[uint8], arg1: paddle::platform::CPUPlace) -> None  8. set(self: paddle.fluid.core.Tensor, arg0: numpy.ndarray[int8], arg1: paddle::platform::CPUPlace) -> None  9. set(self: paddle.fluid.core.Tensor, arg0: numpy.ndarray[float32], arg1: paddle::platform::CUDAPlace) -> None  10. set(self: paddle.fluid.core.Tensor, arg0: numpy.ndarray[int32], arg1: paddle::platform::CUDAPlace) -> None  11. set(self: paddle.fluid.core.Tensor, arg0: numpy.ndarray[float64], arg1: paddle::platform::CUDAPlace) -> None  12. set(self: paddle.fluid.core.Tensor, arg0: numpy.ndarray[int64], arg1: paddle::platform::CUDAPlace) -> None  13. set(self: paddle.fluid.core.Tensor, arg0: numpy.ndarray[bool], arg1: paddle::platform::CUDAPlace) -> None  14. set(self: paddle.fluid.core.Tensor, arg0: numpy.ndarray[uint16], arg1: paddle::platform::CUDAPlace) -> None  15. set(self: paddle.fluid.core.Tensor, arg0: numpy.ndarray[uint8], arg1: paddle::platform::CUDAPlace) -> None  16. set(self: paddle.fluid.core.Tensor, arg0: numpy.ndarray[int8], arg1: paddle::platform::CUDAPlace) -> None  17. set(self: paddle.fluid.core.Tensor, arg0: numpy.ndarray[float32], arg1: paddle::platform::CUDAPinnedPlace) -> None  18. set(self: paddle.fluid.core.Tensor, arg0: numpy.ndarray[int32], arg1: paddle::platform::CUDAPinnedPlace) -> None  19. set(self: paddle.fluid.core.Tensor, arg0: numpy.ndarray[float64], arg1: paddle::platform::CUDAPinnedPlace) -> None  20. set(self: paddle.fluid.core.Tensor, arg0: numpy.ndarray[int64], arg1: paddle::platform::CUDAPinnedPlace) -> None  21. set(self: paddle.fluid.core.Tensor, arg0: numpy.ndarray[bool], arg1: paddle::platform::CUDAPinnedPlace) -> None  22. set(self: paddle.fluid.core.Tensor, arg0: numpy.ndarray[uint16], arg1: paddle::platform::CUDAPinnedPlace) -> None  23. set(self: paddle.fluid.core.Tensor, arg0: numpy.ndarray[uint8], arg1: paddle::platform::CUDAPinnedPlace) -> None  24. set(self: paddle.fluid.core.Tensor, arg0: numpy.ndarray[int8], arg1: paddle::platform::CUDAPinnedPlace) -> None
-paddle.fluid.LoDTensor.set_lod set_lod(self: paddle.fluid.core.LoDTensor, arg0: List[List[int]]) -> None
-paddle.fluid.LoDTensor.set_recursive_sequence_lengths set_recursive_sequence_lengths(self: paddle.fluid.core.LoDTensor, arg0: List[List[int]]) -> None
+paddle.fluid.LoDTensor.set_lod set_lod(self: paddle.fluid.core.LoDTensor, lod: List[List[int]]) -> None
+paddle.fluid.LoDTensor.set_recursive_sequence_lengths set_recursive_sequence_lengths(self: paddle.fluid.core.LoDTensor, recursive_sequence_lengths: List[List[int]]) -> None
 paddle.fluid.LoDTensor.shape shape(self: paddle.fluid.core.Tensor) -> List[int]
 paddle.fluid.LoDTensorArray.__init__ __init__(self: paddle.fluid.core.LoDTensorArray) -> None
-paddle.fluid.LoDTensorArray.append append(self: paddle.fluid.core.LoDTensorArray, arg0: paddle.fluid.core.LoDTensor) -> None
+paddle.fluid.LoDTensorArray.append append(self: paddle.fluid.core.LoDTensorArray, tensor: paddle.fluid.core.LoDTensor) -> None
 paddle.fluid.CPUPlace.__init__ __init__(self: paddle.fluid.core.CPUPlace) -> None
 paddle.fluid.CUDAPlace.__init__ __init__(self: paddle.fluid.core.CUDAPlace, arg0: int) -> None
 paddle.fluid.CUDAPinnedPlace.__init__ __init__(self: paddle.fluid.core.CUDAPinnedPlace) -> None

paddle/fluid/pybind/pybind.cc

@@ -372,7 +372,13 @@ PYBIND11_MODULE(core, m) {
              PADDLE_ENFORCE(CheckLoD(new_lod, vectorize(self.dims()).front()),
                             "the provided lod info is invalid");
              self.set_lod(new_lod);
-           })
+           },
+           py::arg("lod"), R"DOC(
+           Set LoD of the LoDTensor.
+
+           Args:
+               lod (List[List[int]]): the lod to be set.
+           )DOC")
       .def("set_recursive_sequence_lengths",
            [](LoDTensor &self, const std::vector<std::vector<size_t>>
                                    &recursive_sequence_lengths) {
@@ -388,7 +394,17 @@ PYBIND11_MODULE(core, m) {
                  CheckLoD(new_offset_lod, vectorize(self.dims()).front()),
                  "the provided recursive_sequence_lengths info is invalid");
              self.set_lod(new_offset_lod);
-           })
+           },
+           py::arg("recursive_sequence_lengths"), R"DOC(
+           Set LoD of the LoDTensor according to recursive sequence length.
+
+           For example, if recursive_sequence_lengths=[2, 3], meaning that
+           there are two sequences with length 2 and 3 respectively, the 
+           corresponding lod would be [0, 2, 2+3], i.e, [0, 2, 5].  
+
+           Args:
+                recursive_sequence_lengths (List[List[int]]): sequence lengths. 
+           )DOC")
       .def("lod",
            [](LoDTensor &self) -> std::vector<std::vector<size_t>> {
              // output the offset-based lod info
@@ -397,7 +413,13 @@ PYBIND11_MODULE(core, m) {
              new_lod.reserve(lod.size());
              std::copy(lod.begin(), lod.end(), std::back_inserter(new_lod));
              return new_lod;
-           })
+           },
+           R"DOC(
+           Return the LoD of the LoDTensor.
+
+           Returns:
+               out (List[List[int]]): the lod of the LoDTensor.
+           )DOC")
       // Set above comments of set_lod.
       .def("recursive_sequence_lengths",
            [](LoDTensor &self) -> std::vector<std::vector<size_t>> {
@@ -407,12 +429,25 @@ PYBIND11_MODULE(core, m) {
              new_lod.reserve(lod.size());
              std::copy(lod.begin(), lod.end(), std::back_inserter(new_lod));
              return new_lod;
-           })
-      .def("has_valid_recursive_sequence_lengths", [](LoDTensor &self) -> bool {
+           },
+           R"DOC(
+           Return the sequence length of the LoDTensor corresponding to LoD.
+
+           Returns:
+               out (List[List[int]): the sequence lengths. 
+           )DOC")
+      .def("has_valid_recursive_sequence_lengths",
+           [](LoDTensor &self) -> bool {
              // Check that the lod info is valid and match the outermost
              // dimension of the LoDTensor data
              return CheckLoD(self.lod(), vectorize(self.dims()).front());
-      });
+           },
+           R"DOC(
+           Check whether the lod of the LoDTensor is valid.
+
+           Returns:
+               out (bool): whether the lod is valid.
+           )DOC");
 
   py::class_<SelectedRows>(m, "SelectedRows")
       .def("__init__",
@@ -548,11 +583,45 @@ All parameter, weight, gradient are variables in Paddle.
            [](Scope &self, const std::string &name) -> Variable * {
              return self.Var(name);
            },
+           py::arg("name"),
+           R"DOC(
+           Find or create variable named :code:`name` in the current scope. 
+
+           If the variable named :code:`name` does not exist in the 
+           current scope, the variable would be created. Otherwise,
+           return the existing variable. 
+
+           Args:
+               name (str): the variable name.  
+          
+           Returns:
+               out (core.Variable): the found or created variable. 
+           )DOC",
+           py::return_value_policy::reference)
+      .def("find_var", &Scope::FindVar, py::arg("name"),
+           R"DOC(
+           Find variable named :code:`name` in the current scope or 
+           its parent scope. Return None if not found.
+        
+           Args:
+               name (str): the variable name.
+            
+           Returns:
+               out (core.Variable|None): the found variable or None.   
+           )DOC",
            py::return_value_policy::reference)
-      .def("find_var", &Scope::FindVar, py::return_value_policy::reference)
       .def("new_scope", [](Scope &self) -> Scope * { return &self.NewScope(); },
+           R"DOC(
+           Create a new sub-scope of the current scope.
+
+           Returns:
+               out (core._Scope): the created sub-scope.
+           )DOC",
            py::return_value_policy::reference)
-      .def("drop_kids", &Scope::DropKids);
+      .def("drop_kids", &Scope::DropKids,
+           R"DOC(
+           Delete all sub-scopes of the current scope.
+           )DOC");
 
   m.def("Scope",
         []() -> Scope * {
@@ -560,6 +629,12 @@ All parameter, weight, gradient are variables in Paddle.
           ScopePool::Instance().Insert(std::unique_ptr<Scope>(s));
           return s;
         },
+        R"DOC(
+        Create a new scope.
+        
+        Returns:
+            out (core._Scope): the created scope.
+        )DOC",
         py::return_value_policy::reference);
 
   //! @note: Be careful! PyBind will return std::string as an unicode, not
@@ -782,11 +857,13 @@ All parameter, weight, gradient are variables in Paddle.
              self[i].ShareDataWith(t);
              self[i].set_lod(t.lod());
            })
-      .def("append", [](LoDTensorArray &self, const LoDTensor &t) {
+      .def("append",
+           [](LoDTensorArray &self, const LoDTensor &t) {
              self.emplace_back();
              self.back().ShareDataWith(t);
              self.back().set_lod(t.lod());
-      });
+           },
+           py::arg("tensor"), "Append a LoDensor to LoDTensorArray.");
 
   m.def("IsInplace",
         [](std::string op) -> bool { return operators::IsInplace(op); });